NCP51705SMDGEVB

NCP51705SMDGEVB NCP51705 Mini SMD Evaluation Board User s Manual NCP51705 SiC Driver SMD Evaluation www.onsemi.com Board for Existing or New PCB Designs EVAL BOARD USERS MANUAL Purpose This document describes the use and applications for the NCP51705 SiC driver mini SMD EVB. The EVB is designed on a four layer PCB and includes the NCP51705 driver and all the necessary drive circuitry. The EVB also includes an onboard digital isolator and the ability to solder any MOSFET or SiC MOSFET in a TO247 high voltage package. The EVB does not include a power stage and is generic from the point of view that it is not dedicated to any particular topology. It can be used in any lowside or highside power switching application. For bridge configurations two or more of these EVBs can be configured in a totem pole type drive configuration. The EVB can be considered as an isolator+driver+TO247 discrete module. NCP51705 Description Figure 1. Evaluation Board Photo The NCP51705 driver is designed to primarily drive SiC MOSFET transistors. To achieve the lowest possible conduction losses, the driver is capable of delivering the maximum allowable gate voltage to the SiC MOSFET device. By providing high peak current during turnon and turnoff, switching losses are also minimized. For improved reliability, dv/dt immunity and even faster turnoff, the NCP51705 can utilize its onboard charge pump to generate a user selectable negative voltage rail. For full compatibility and to minimize the complexity of the bias solution in isolated gate drive applications the NCP51705 also provides an externally accessible 5 V rail to power the secondary side of digital or high speed optical isolators. The NCP51705 offers important protection functions such as undervoltage lockout monitoring for the bias power and thermal shutdown based on the junction temperature of the driver circuit. Internal simplify block diagram can be seen in Figure 2. More detailed information about all blocks could can be found in datasheet. Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: April, 2019 Rev. 2 EVBUM2590/DNCP51705SMDGEVB V5V SVDD 23 21 5V REG DESAT / 25 A DESAT/CS CURRENT 22 SENSE UVSET 24 UVLO VDD 20 TSD 19 VDD 5V OK VDD OK RUN PROTECTION LOGIC VEE OK OUTSRC 18 IN+ 1 DRIVER INPUT LOGIC OUTSRC 17 LOGIC IN 2 & LEVEL 14 OUTSNK SHIFT XEN 3 OUTSNK 13 CHARGE PUMP CPCLK PGND 16 REG SGND 4 CHARGE PUMP POWER STAGE 15 PGND 5 6 7 8 11 12 9 10 Figure 2. Simplified Block Diagram Figure 3. NCP51705 SMD Mini Board Top and Bottom View www.onsemi.com 2 VEESET VCH C+ C VEE VEE PGND PGND